Q. No.
Which one of the following is being tried in India as a biofuel substitute for fossil fuels?
1. Jatropha
2. Azadirachta
3. Musa
4. Aegilops
1. Jatropha
2. Azadirachta
3. Musa
4. Aegilops
In which one of the following the BOD (Biochemical Oxygen Demand) of sewage (S), distillery effluent (DE), paper mill effluent (PE) and sugar mill effluent (SE) have been arranged in ascending order?
1. SE < S < PE < DE
2. SE < PE < S <DE
3. PE < S < SE < DE
4. S < DE < PE <SE
In a coal fired power plant, electrostatic precipitators are installed to control the emission of:
1.
2.
3. SPM
4. CO
1. CFCs 14%, CH4 20%
2. CO2 40%, CFCs 30%
3. N2O 6%, CO2 86%
4. CH4 20%, N2O 18%
Which one of the following is not a bioindicator of water pollution?
1. Sludge-worms
2. Blood-worms
3. Stone files
4. Sewage fungus
Ultrasound of how much frequency is beamed into a human body for sonography?
1. 30-40 MHz
2. 15-30 MHz
3. 1-15 MHz
4. 45-70 MHz
Montreal protocol which calls for appropriate action to protect the ozone layer from human activities was passed in the year:
1. 1986
2. 1987
3. 1988
3. 1985
Photochemical smog pollution does not contain:
1. ozone
2. nitrogen dioxide
3. carbon dioxide
4. PAN (Peroxy Acyl Nitrate)
The limit of BOD prescribed by Central Pollution Control Board for the discharge of industrial and municipal wastewater into natural surface water is:
1. < 3.0 ppm
2. < 10 ppm
3. < 100 ppm
4. < 30 ppm
Which one of the following statements is correct?
| 1. | Extensive use of chemical fertilizers may lead to eutrophication of nearby water bodies |
| 2. | Both Azotobacter and Rhizobium in root nodules of plants |
| 3. | Cyanobacteria such as Anabaena and Nostoc are important mobilizers of phosphates and potassium for plant nutrition in the soil |
| 4. | At present it is not possible to grow maize without chemical fertilizers |
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